Telephone receives and receiver-switch



A. ENGELBERG.

TELEPHONE RECEIVER AND, RECEIVER SWITCH.

APPLICATION FlL-ED mrmr, m9.

2 SHEETS-SHEET Patented Apr. 20, 1920.

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TELEPHONE RECEIVER AND RECEIVER SWITCH.

APPLICATION man 1A-.27,1919.

1,337,892. P tented Apr. 20, 1920.

2 SHEETSSHEET 2.

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Chrome UIT ST TESS TELEPHONE RECEIVER RECEIVER-SWITCH.

Application filed January 2?, 1919.

To all whom it may concern:

Be it known that I, ARTHUR lihvcntnnnc,

citizen of the United States, residing at akland, in the county otAlameda and State of California, have invented certain ne v and usefulImprovements in Telephone Receivers and Recsiver-Switches, of which thefollowing is a specification.

My invention is an improved telephone receiverand receiver switch.

My improved receiver is shorter and lighter than the standard telephonereceiver now in use and may be connected with a shorter wire than isrequired by the stand ard receiver.

My invention is illustrated in the accompanying drawing which forms apart oi? this specification and the appended claims.

Referring to the drawing:

Figure 1 is a side elevation of a telephone embodying my invention thestandard of the telephone being broken away to show the receiver switch.

Fig. 2 is arear view or the telephone as shown in Fig. 1. certain partsof the telephone being broken away, and the receiver switch being shownopen or in the position it assumes when the receiver is on the hook.

Fig. 3 is a view corresponding to Fig. 2, except that the receiverswitch is shown closed or in the position it assumes when the receiveris removed from the hook.

Fig. 4 is a sectional view taken on line l-4 of Fig. 1.

Fig. 5 is a sectional view taken on line 5-5 oi Fig. 1.

Fig. 6 is a diagram of a telephone system illustrating my invention, thereceiver switch being open.

Fig. 7 is a view similar to 6, the receiver switch being closed.

In the drawing, 1 indicates the stand, 2 the transmitter and 3 thereceiver of a telephone,-

the stand including the base h, tubular standard 5 and support 6, whichhits within and rests on the upper end of the standard in the usualmanner. The transmitter is pivoted as usual at 7 to the upper end oi thesupport 6.

A receiver hook 8 is fixed to the support 6.. The hook is formed of asingle strip of metal bent in the middle in the form of a loop 9 andupon itself from the loop to its ends. The loop 9 surrounds the shank 10of the support 6 and is clamped thereon by a bolt 11, extending throughthe hook Specification of Letters Patent.

Patented Apr. 2%}, t92tl.

Serial Ito. 273,2d5.

just beyond the loop and a nut 11 screwing on said bolt against thehook. The hook is notched at 12 in which an eye 13 on the top of thereceiver is hooked to hold the receiver on the hook. The eye 13 istermed with a threaded shank 13 which extends through an aperture 14 inthe top of the receiver and is hooked into an eye 41-9 of a brass band50 which encircles the weight connection 15, thus connecting the eye tothe receiver weight 1%? inside oi the receiver.

The receiver cord 16 carrying the receiver leads 17 and 18 extendsthrough. the receiver aperture it in the usual manner.

it. unique receiver switch 20 is provided for making or breaking thetelephone circuit as the receiver is removed from or hung on the hook.The switch includes the usual spring contacts 21 and and the contact 23,a wedge 24, roller 25, rod 26 and lever 27. The wedge 24 is secured tothe lower end of rod 26 which extends through a bore 28 through thesupport 6. The roller is journaled in a bracket 29 secured to bar 30forming part oi support 6, and on which the contacts 21. 22 and 23 aremounted. The upper end of the rod 26 is reduced and threaded and extendsthrough an eye 31 on the rear end of lever 27 and a shoulder 32 isformed on said rod at the base of said reduced end upon which said eyerests. The lever 2'? pivoted to the hook 8 by pivot 33, the pivot havingan eye ti l through which the lever extends. The pivot may he formed ofa single piece of metal bent in the form of the eye 34: and upon itself,to extend through an opening 35 in the hook, and the ends bent outwardly to hold the pivot in one direction against atrial movement thepivot being held against axial movement in the other direction by eye84-. A light spring 36 connects to the lever 27 and to the support 6 andforces the rear end of the lever. and the rod 26 and wedge 24 downwardlywhen the receiver is removed l'rom the hook, causing the wedge to enterbetween roller 25 and contact 21 and close the receiver switch as shownin Fig. 3. A. nut 3'? screws on the upper reduced end oi the rod. 26.Upon placing the receiver upon the hook the weight of the receiver bearsthe forward end of the lever down and the rear end up which movementcauses the eye 31 to engage nut 37 and lift the rod 26 upwardly and thewedge 24; from the roller 25 and con tact 21, thus opening the receiverswitch. Upon removing the receiver the spring 36 draws the rear end oflever 27 down and the forward end up, and the eye 31 engages theshoulder 32 r and forces the rod and wedge into engagement with roller25 and contact 21, thus closing the receiver switch.

The usual terminals R, GN and Y are provided for connecting thetelephone cirsuit.

The spring 36 may be very light so that the receiver and weight 15 maybe reduced in length, thus reducing the weight of the receiver andshortening the length of the receiver cord 16 which is necessary withthe present standard receiver.

Parts of the rod 26 and lever 27, and the spring 3G may be inclosed by ametal casing 4t0 to prevent said parts from being injured.

The receiver is less than half the weight of the present one, the cordis considerably shorter than the one in use now, and cannot, therefore,catch on corners of desks, twist out of shape, become soiled fromnecessary handling and cause accidents to the telephone instrument bybeing thrown to the floor and to objects lying or standing on desks,like inkstands etc.

Another advantage of the invention is the noiseless working of it; thereare many people who become impatient if the operator does not at onceanswer their call; they work the receiver hook up and down repeatedly,causing thereby disagreeable noises. This invention does not admit ofsuch practice; it makes, at least, no noise it the end oi? the levergoverning the contact is pressed down.

Having described my invention. .1 claim:

1. In a telephone. a fixed receiver hook and a receiver switch includingcontacts. a roller, a wedge a rod to which said wedge is connected, alever to be engaged by the receiver when on the hook and engaging saidrod to withdraw said wedge from be tween said roller and said contactsto open the switch when the receiver is on the hook. and a spring forswinging said lever to force said wedge between the roller and contactsto close the receiver switch when the receiver is removed from the hook.

2. In a telephone, a fixed receiver hook, and a receiver switchincluding contacts, a roller, a wedge and means for forcing said wedgebetween said roller and said contacts to close the switch when thereceiver is oil' the hook and for withdrawing said wedge to open saidswitch when the receiver is placed on the hook.

In testimony whereof ll allix my signature.

ARTHUR ENGELBERG.

